Mask



FIG. 1 is a perspective view of a mask according to my new design; and,

FIG. 2 is an enlarged, front elevational view thereof.

The broken line showing of fabric panels and interior nose rest in FIGS.1 and 2 are included for the purpose of showing environmental portionsof the mask and forms no part of the claimed design.

The ornamental design for a mask, as shown and described.